A. Did these documents print correctly previously or have they never printed correctly.
B. Have you changed your PC, operating system or printer recently.
Two tests to help identify whether the problem is with Word or with the operating system/printer:
1. Take a document that stops printing normally.
Note the last page that prints correctly (what text etc. it contains), and how many pages printed correctly.
Delete several pages at the start of the document in the part that prints normally.
Print the document again.
Is the last normal page the same page as before (same text etc.) or is it a later page. Also how many pages printed correctly.
2. Take a copy of the original document and see if someone else can print it normally - preferably someone with a different operating system (not Windows 7).
Let us know what happens.